Renting a car in Ireland & Great Britain: 1 rental or 2?

Disclaimer: As a car rental professional based in the UK (broker), I have a lot of insights when it comes to renting a car on both islands.

First of all – a one way fee from Ireland to London, from what I can see is rarely allowed and when it is, it will cost you a lot. Be advised that if you find a company who will accept that which I really doubt, you will have to pay extra insurance for taking the car on a ferry + the ferry tax for the car.

So, here is my advice:
From Dublin to Belfast, hire only one car. You will have to pay a one way fee, varying from £117 to £145, however it is still an economic way to travel, rather than hire a car on each side of the island and in between travel by public transportation.

Why is better this way?

1. you will only have to pay the rental security deposit once, which is important because you won’t have too much money blocked while on holiday.

2. Comfort. Having to leave the car and take public transportation between Ireland and Northern Ireland can be tiring and also costly.

From N. Ireland to Scotland, I’ll recommend the airplane. There are cheap flight towards all airports in Scotland.

If you decide on the ferry from Belfast to Cairnryan, on arrival you will have to take public transportation to one of the large cities in Scotland. There you would be able to hire a car.
If you feel adventurous, you can do that, me personally I prefer the plane option.

If you take the plane to one of the major cities in Scotland, from the airport you can hire a car (one way) and drop it to London.
Now, there are companies which won’t charge you any one way fee or there can be a fee as low as £30 which is totally acceptable in my opinion.
Now it depends on which company you choose. I won’t say any names as it might be against the rules of the forum.

In terms of insurance, in Ireland and UK the car rentals come with basic insurance(CDW + Theft with excess) and third party liability insurance included (these are the regulations here).
If you wish to reduce the excess you can purchase extra insurance either from the supplier itself or third party (which is cheaper).
Be advised that 3rd party insurance doesn’t reduce the excess on car rental and works on claim basis only.
I hope my answer helps. Have a good trip!

The excessive cost from Hertz is to pay for somebody to bring back an Irish registered car to Ireland and then fly back to London. Two days work probably, plus ferry and flight.

Only multinationals like Hertz and Avis will accept your card insurance, so be careful to check with whomever you rent, that you are fully covered!

I reckon the Dublin to Dublin route is the one to go for. Keep the car all the time. Never mind parking on the outskirts of London and tubing in, park further away and take the train in. Check with the stations beforehand. Didcot Parkway is a good choice, West of London. Only 40 minutes from central London and a big car park with 1127 parking spaces. The advantage of not having to pack, unpack and pack your car each time you take a ferry/flight are inestimable. Doing it this way, you only have one journey into London and one out.

Check with the rental company that you can take the car abroad. Ireland and the UK are two separate sovereign countries with different governments and currencies and you will definitely need permission to take the car abroad. You will also need a VE103b form which allows you to take a rental vehicle on ferries between two countries in the European Community. This is issued by the rental company and I guarantee you will never be asked by the ferry companies, but by law, you need one. The rental company will also require you to take out “international breakdown recovery” cover, which can be arranged with the automobile association in Ireland. Your problem is going to be communicating with a rental company who will let you do all this.

Celtic Car Rental would let you do the two rentals in both countries separately if you prefer to do that, but I do not know who to contact to do a round trip rental. Why not contact Hertz customer support and see what they say. It is the contact form for Ireland Hertz, so you will be talking to the locals.

• There probably will be a one-way rental fee between Ireland and the UK. For example, Hertz describe theirs in general terms here (update: it looks to be around ~1000 EUR+ for Ireland to the UK). I know from past experience that Hertz, for example, will show you the applicable one-way rental fee as part of the costing if you plan a reservation on their website (you don’t need to actually book it). I assume other rental companies are similar. You can also use this to compare the one-way rental in one direction and the other.

• Most major rental companies will have offices in city centres in Ireland, NI, and the UK mainland, and typically the largest (with the most choice and best opening hours) will be near airports, ferry terminals, and major train stations (the latter in turn typically being in city centres).

• Be careful about the credit card covering your car rental insurance. I’m assuming you’re from the US, where this kind of thing is typical. Make 100% sure it covers the insurance abroad, too – it might well not do. This concept doesn’t typically exist in the UK, for example, so most people buy the add-on insurance from the rental company. I’m not sure about the situation in Ireland.

I think your best option is probably to rent one car for Ireland/NI (checking on the one-way fee), and another for the UK. Failing that, I think the second best option is to keep the same car all the way from Dublin back to Dublin. Either way, watch for costs in London from the Congestion Charge and Parking (an example national chain you can use for representative costs is here).